Trouble in Paradise: Is Tourism Damaging the Planet?

Haad Rin beach on the island of Koh Pha Ngan, Thailand, in 1979. The new documentary, “Gringo Trails,” looks at how tourism is threatening some previously little-known destinations. Costas Christ / Icarus Films

The documentary “Gringo Trails” looks at how an influx of millions of new travelers is threatening some tourist destinations.

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